linux-kernel - Re: futex strangeness in 2.6.23-mm1/UML

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Message-Id: <E1IkGut-0004X1-00@dorka.pomaz.szeredi.hu>
Date:	Tue, 23 Oct 2007 12:23:19 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	xemul@...nvz.org
CC:	riel@...hat.com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, xemul@...nvz.org, raven@...maw.net
Subject: Re: futex strangeness in 2.6.23-mm1/UML

> >> I guess we can debug it in the old-fashioned ways.  The first of which is
> >> to palm the problem off on Pavel ;)
> 
> I look at the 2.6.23-mm1 and see that there's one hunk lost. This
> is the one Oleg re-sent some days ago (the mail thread subject was
> 2.6.23-mm1 thread exit_group issue). Here it is (sent 13 oct 2007):
> 
> --- kernel/fork.c~	2007-10-13 15:41:35.000000000 +0400
> +++ kernel/fork.c	2007-10-13 15:41:41.000000000 +0400
> @@ -1443,6 +1443,9 @@ long do_fork(unsigned long clone_flags,
>  			task_pid_nr_ns(p, current->nsproxy->pid_ns) :
>  				task_pid_vnr(p);
>  
> +		if (clone_flags & CLONE_PARENT_SETTID)
> +			put_user(nr, parent_tidptr);
> +
>  		if (clone_flags & CLONE_VFORK) {
>  			p->vfork_done = &vfork;
>  			init_completion(&vfork);
> 
> Please, try with this patch.

Thanks.  This patch does indeed seem to solve the problem.

Miklos
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